Ejemplo Fichero: /etc/udev/udev.rules

# There are a number of modifiers that are allowed to be used in some
# of the different fields. They provide the following subsitutions:
# %n - the "kernel number" of the device.
#      For example, 'sda3' has a "kernel number" of '3'
# %k - the kernel name for the device.
# %M - the kernel major number for the device
# %m - the kernel minor number for the device
# %b - the bus id for the device
# %c - the string returned by the PROGRAM. (Note, this doesn't work within
#      the PROGRAM field for the obvious reason.)
# %s{filename} - the content of a sysfs attribute.  
# %% - the '%' char itself.
#

# /dev/cdrom symlink
BUS="ide", KERNEL="hd[a-z]", SYMLINK="cdrom dvd"

# permissions for IDE CD devices
BUS="ide", KERNEL="*[!0-9]", PROGRAM="/bin/cat /proc/ide/%k/media", RESULT="cdrom*", NAME="%k", MODE="0660", GROUP="cdrom"

# permissions for IDE floppy devices
BUS="ide", KERNEL="*[!0-9]", PROGRAM="/bin/cat /proc/ide/%k/media", RESULT="floppy*", NAME="%k", MODE="0660", GROUP="floppy"

# permissions for SCSI sg devices
BUS="scsi", KERNEL="s[grt][0-9]*", SYSFS_type="5", NAME="%k", MODE="0660", GROUP="cdrom"

# put removable IDE/SCSI devices into group 'plugdev' instead of 'disk'
BUS="scsi", KERNEL="sd[a-z]*", PROGRAM="/etc/udev/removable.sh %k", RESULT="1", NAME="%k", MODE="0660", GROUP="plugdev"
BUS="ide", KERNEL="hd[a-z]*", PROGRAM="/etc/udev/removable.sh %k", RESULT="1", NAME="%k", MODE="0660", GROUP="plugdev"

# USB devices
BUS="usb", KERNEL="hiddev*",	NAME="usb/%k"
BUS="usb", KERNEL="auer*",	NAME="usb/%k"
BUS="usb", KERNEL="legousbtower*", NAME="usb/%k"
BUS="usb", KERNEL="dabusb*",	NAME="usb/%k"
BUS="usb", KERNEL="lp[0-9]*",	NAME="usb/%k"

# ALSA devices
KERNEL="controlC[0-9]*", NAME="snd/%k"
KERNEL="hw[CD0-9]*",	NAME="snd/%k"
KERNEL="pcm[CD0-9cp]*",	NAME="snd/%k"
KERNEL="midi[CD0-9]*",	NAME="snd/%k"
KERNEL="timer",		NAME="snd/%k"
KERNEL="seq",		NAME="snd/%k"

# input devices
KERNEL="mice",		NAME="input/%k"
KERNEL="mouse*",	NAME="input/%k"
KERNEL="event*",	NAME="input/%k"
KERNEL="js*",		NAME="input/%k"
KERNEL="ts*",		NAME="input/%k"

KERNEL="card*",		NAME="dri/card%n"
KERNEL="cdemu[0-9]*",	NAME="cdemu/%n"

KERNEL="tap*",		NAME="net/%k"
KERNEL="tun",		NAME="net/%k"

# CAPI devices
KERNEL="capi",		NAME="capi20", SYMLINK="isdn/capi20"
KERNEL="capi*",		NAME="capi/%n"

# dm devices (ignore them)
KERNEL="dm-[0-9]*",	NAME=""
KERNEL="device-mapper",	NAME="mapper/control"